Nut-lock.



G. B. BURROWS.

NUT LOOK.

APPLIOATION FILED JULY 26, 1909. 7

964,849. Patented July 19, 1910. V

"fantas es: Inventor:

UNITED srarns Parana? OFFICE.

CLARENCE B. BURBOWS, OF BEVERLY, MASSACHUSETTS, ASSIGNOR TO BEVERLYLOCK-NUT AND LOOK-BOLT COMPANY, A CORPORATION OF MASSACHUSETTS.

NUT-LOCK.

To (ZZZ whom it may concern:

Be it known that I, CLARENCE B. BUR- Rows, a citizen of the UnitedStates, and a resident of Beverly, in the county of IESSGX andCommonwealth of Massachusetts, have invented an Improvement inNut-Locks, of which the following description, in connection with theaccompanying drawings, is a specification, like letters on the draw ingsrepresenting like parts.

This invention relates to nut-locks its object being to provide a simplebut efficient form of nut-lock which is capable of being manufactured inlarge quantities without practical difliculties and at a low cost.

The invention will be best understood by reference to the followingdescription when taken in connection with the accompanying illustrationof one specific embodiment thereof while its scope will be moreparticularly pointed out in the appended claims.

In the drawings: Figure 1 is a plan view of a nut provided with alocking device embodying one form of my invention. Fig. 2 is anelevation partly in section showing the key in its applied position ofFig. 1. Fig. 3 is a similar elevation showing the key in its releasedposition. Fig. 4 is an end elevation of the key shown in Fig. 3. Fig. 5is an end elevation of a modified form of key. Fig. 6 is a sectionalelevation showing a nut with a modified form of nutlock. Fig. 7 is anend elevation of the nut-lock. Figs. 8 and 9 are similar views of stillanother modified form of nut lock.

Referring to Figs. 1 to 41 inclusive and to the embodiment of myinvention which I have there shown for illustration, an ordinary nut 1is shown provided with a slotlike cavity 2 extending transversely fromthe threaded bolt hole towardthe side walls of the nut. While the slotmay be located in any suitable part of the nut and may terminate shortof its side walls, in order to weaken the walls of the nut as little aspossible the slot is out toward one of the corners of the nut throughits greatest available cross sectional area, and, for convenience inapplying or releasing the key it is cut entirely through the side walls.

As shown in Figs. 2 and 3 the bottom3 of the slot is inclined downwardlytoward the exterior of the nut and away from the threaded bolt hole soas to form an out Specification of Letters Patent.

Application filed July 26, 1909.

Patented July 19, 1910.

Serial No. 509,555.

wardly and downwardly inclined seat for the key 1, the lower edge of thelatter being preferably so shaped as to conform to the incline of theslot bottom.

The key is suitably proportioned to present a projecting portion 5extending above the upper or outer surface of the nut and preferably atthe rear of the key. If desired, the key may present this projection bymeans of a raised portion (as shown in Fig. 6) but, owing to the usualbevel of the nut, the key, if constructed so as to be flush with orsomewhat below the upper surface of the nut when in its releasedposition (Fig. 3), will present a corner as shown in Fig. 2 projectingabove the nut, which corner at its outer or back edge can be struck ablow with a hammer or other implement to drive the key inwardly withinthe slot and from the position shown in Fig. 3 to that shown in Fig. 2.

The inner or cutting edge 6 of the key is sharpened (and the key ispreferably of hardened steel) so that the application of the key causesits thread indenting edge to sink into the threads of the bolt and holdthe latter against turning until the key is intentionally released.

Means are preferably provided to retain the key as a permanent part ofthe nut while permitting its repeated application and release to thethreads of the bolt. In the key shown in Figs. 1-3 this is accom plishedby giving the side oft-he key a gradual. bevel from its lower part tothe top as shown in Fig. 4 so that the key has the appearance of a wedgein end view or cross section. When this key is placed in the slot, thewalls of the latter are forced in and about the upper or narrow portionof the key by pressure applied against the top surface of the nut by anysuitable means. This effectively retains the key against the withdrawalfrom the top of the slot, while the bevel of the side walls of the keyis so gradual that it readily permits the slight endwise movement of thekey in the slot which is necessary for its application or release.

In its released position the back of the key preferably terminatesapproximately flush with the edge of the nut so that when driven intothe position shown in Fig. 2- there is left a small amount of metal backof the key and at the corner of the nut on either side of the slot whichmetal can be upset or headed over the back of the key by the sameimplement which is used to drive the key into the threads of the bolt.This serves effectively to prevent release of the key until such releaseis desired. To release the key a sharp blow delivered on the upper edgeof the key and preferably slanting outwardly will free the key from thebolt threads and drive it down the incline and to the rear of the slot,forcing it from the position shown in Fig. 2 to that shown in Fig. 3. Itwill therefore be seen that the inclined seat facilitates the release ofthe key when desired, requiring only the application of a hammer orother implement to the projecting portion of the key, while at the sametime it permits the forcing of the key against the bolt for locking thenut by an equally simple application of the hammer, or other tool, tothe said projecting portion. The relatively soft metal which has beenpreviously upset at the back of the key will readily yield to permitthis releasing movement of the key.

To better look the key against accidental release the edge 6 of the keyis preferably shaped as shown in Fig. 1 so that the bevel. of the edgeis mainly or wholly on the side of the key opposite to that whichreceives the thrust or strain of the bolt if the latter tends tounthread. This prevents any wedging action by the bolt against the keywhich would occur to some extent if an edge beveled or partly beveledwere presented to the bolt on that side of the key.

If a key with a beveled side wall is employed it is unnecessary thatboth side walls should be beveled as shown in Fig. 4, but a wedge-shapedkey, such as shown in Fig. 5, may be utilized having one wall onlyformed with a bevel.

If desired a key with parallel side walls may be employed such as isshown in Fig. 7 such key being permanently retained in the nut byheading over the metal on the top surface of the nut against the top ofthe key which latter is provided with front and rear projections 7 and 8respectively and the intermediate depression 9. The key is retained byupsetting the metal in the side walls of the slot over the depresseion9.

While preferably a slot is employed having an inclined seat, if desired,a slot and a key may be utilized as shown in Figs. 8 and 9 where noinclination is provided. Here the key is applied to the threads of thebolt in the same manner as described with reference to the key in Figs.l-3 inclusive. To release the key however, it is provided with an upwardrear projection 10 which may be struck obliquely a slanting blow sodirected as to drive the key out of engagement with the threads of thebolt and to the rear of the slot.

Many changes may be made in construction and relative arrangement of theparts herein described without departing from the spirit of theinvention, the foregoing modifications having been submitted solely forthe sake of illustrating the invention.

Claims.

1. A nut having a slot shaped cavity opening into the bolt hole andhaving a seat inclined away from the bolt hole and a bolt engaging keyin said cavity having a threadengaging end adapted to be forced againstthe threads of the bolt, said key having a sliding engagement with saidinclined seat whereby the release of the key may be facilitated.

2. A nut having a slot shaped cavity opening into the bolt hole andhaving an inclined seat, and a thread indenting key having a threadindenting end adapted to be driven in an approximately radial directiontoward the bolt to enter the threads thereof, said key having a slidingengagement with said inclined seat.

3. A nut having a slot shaped cavity opening into the bolt hole and alsoupon the upper surface of the nut, and having an inclined seat, a threadengaging key in said cavity having a sliding engagement with said seat,said key presenting a portion projecting above the open mouth of theslot whereby the key may be forced into the threads of the bolt or backto a position of release.

4;. A nut having a slot shaped cavity 2 provided with an inclined seat3, the thread indenting key 4- slidable in said cavity and on said seat,the projecting portion 5 and the thread engaging end 6.

5. A nut having a cavity terminating at the bolt hole and openingthrough the upper and outer walls of the nut, a thread indenting keypresenting a driving portion projecting above the upper walls of thenut, said key in its locked position terminating short of the side wallsof the nut whereby it may be locked therein by upsetting the metalthereat.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

CLARENCE B. BURROWS.

Vitnesses EVERETT S. EMERY, ROBERT H. KAMMLER.

